some improvements and updates

pus_tc/system/common.py

@@ -1,10 +1,16 @@
+from typing import Union
+
 from tmtccmd.tc.definitions import TcQueueT, QueueCommands
 from spacepackets.ecss.tc import PusTelecommand
 from tmtccmd.tc.pus_200_fsfw_modes import pack_mode_data, Modes, Subservices
 
 
 def command_mode(
-    object_id: bytes, mode: Modes, submode: int, tc_queue: TcQueueT, info: str
+    object_id: bytes,
+    mode: Union[int, Modes],
+    submode: int,
+    tc_queue: TcQueueT,
+    info: str,
 ):
     tc_queue.appendleft((QueueCommands.PRINT, info))
     mode_data = pack_mode_data(